package org.tinaelle.servlet.utils.json;

/*
 * Copyright (c) 2002 JSON.org
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated
 * documentation files (the "Software"), to deal in the Software without restriction, including without limitation the
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the
 * Software.
 * 
 * The Software shall be used for Good, not Evil.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
 * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

/**
 * The HTTPTokener extends the JSONTokener to provide additional methods for the parsing of HTTP headers.
 * 
 * @author JSON.org
 * @version 2
 */
public class HTTPTokener extends JSONTokener {

	/**
	 * Construct an XMLTokener from a string.
	 * 
	 * @param s
	 *            A source string.
	 */
	public HTTPTokener(final String s) {
		super( s );
	}

	/**
	 * Get the next token or string. This is used in parsing HTTP headers.
	 * 
	 * @throws JSONException
	 * @return A String.
	 */
	public String nextToken() throws JSONException {
		char c;
		char q;
		final StringBuffer sb = new StringBuffer();
		do {
			c = next();
		} while ( Character.isWhitespace( c ) );
		if ( ( c == '"' ) || ( c == '\'' ) ) {
			q = c;
			for ( ;; ) {
				c = next();
				if ( c < ' ' ) {
					throw syntaxError( "Unterminated string." );
				}
				if ( c == q ) {
					return sb.toString();
				}
				sb.append( c );
			}
		}
		for ( ;; ) {
			if ( ( c == 0 ) || Character.isWhitespace( c ) ) {
				return sb.toString();
			}
			sb.append( c );
			c = next();
		}
	}
}
